Assignment of allotypes G1m(a+) and G1m(a-) at the genomic level by polymerase chain reaction analysis
A method of assignment of the human immunoglobulin allotypes G1m(a+) and G1m(a-) without the use of serological reagents is described. It is based upon oligonucleotide-directed enzymatic amplification of genomic segments encoding CH3 of gamma chains, followed by dot-blot hybridization of radioactively labelled oligonucleotides to the amplified DNA. The method was used to classify the immunoglobuli